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Proceedings Paper

TOW Target Collimator Design Review And Performance Tests
Author(s): Martin Wolk; G. Coddington; E. Armstrong
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Paper Abstract

The target collimator test set for the tube-launched, optically tracked, wire-guided (TOW) missile launch system is reviewed and tested to facilitate calibration with emphasis on system alignment. Test set objective lens dispersion data and Gaussian analysis for visible and infrared (IR) wavelengths are included; associated optical point spread and modulation transfer curves obtained from observations at 0.6328 um with a Wyko model 6000 interferometer are also exhibited. In addition, test set bandpass filter transmittance spectra in the visible and near IR, obtained with a Bomem model DA3.02 Fourier-transform interferometer spectrometer, are displayed as well as mean transmittance values weighted with standard photopic data over indicated spectral intervals. Evaluation of the data presented indicates the need for more stringent requirements for test set bandpass filter specifications in order to reduce the recently emerged visual alignment problem essentially caused by chromatic aberration correlated with use of new stock filters. Primarily due to this result, a new design version of the test set employing a reflective collimator would be more appropriate to cover the required visible, 575 nm, and near IR, 0.94 um and 1.25 um peak nominal wavelengths, provided it is sufficiently cost-effective to implement. This investigation should be of interest and useful for those engaged in related optical alignment work especially for those involved with electro-optic calibration support of TOW.

Paper Details

Date Published: 1 February 1990
PDF: 26 pages
Proc. SPIE 1156, Airborne Reconnaissance XIII, (1 February 1990); doi: 10.1117/12.962491
Show Author Affiliations
Martin Wolk, Naval Aviation Depot (United States)
G. Coddington, Marine Corps Logistics Base (United States)
E. Armstrong, Marine Corps Logistics Base (United States)

Published in SPIE Proceedings Vol. 1156:
Airborne Reconnaissance XIII
Paul A. Henkel; Francis R. LaGesse; Wayne W. Schurter, Editor(s)

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